JP2005189597A - Structure for hosing and holding display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for housing and holding a display panel which can house the display panel easily and securely at a prescribed position in a case with no play without being damaged, and which is superior in operability and reliability capable of being easily disassembled. <P>SOLUTION: Two couples of elastic flexible piece clamp pieces 12d each, i.e. four couples in total are arranged at longitudinally and laterally opposite positions of peripheral walls 12 of the panel case 10 which houses the liquid crystal display panel Lp, and press pieces 23 are formed opposite them by machining side plates 22 of a shield case 20 into leaf springs. When the shield case 20 is fitted to the panel case 10, the respective press pieces 23 are pressed against the corresponding clamp pieces 12d to clamp both corresponding end surfaces of the liquid crystal display panel Lp with the couples of clamp pieces 12, thereby holding the liquid crystal panel Lp at its proper storage position where the center of the display area Av meets the center of a display window 21a of the shield case 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a case housing and holding structure for a flat display panel (flat display panel) such as a liquid crystal display panel.

  Conventionally, as a method of storing and holding a flat display panel such as a liquid crystal display panel in a predetermined position in the case, an edge portion removed from the display area of the liquid crystal display panel using an adhesive material such as a double-sided tape is formed on the bottom surface of the case. A method of attaching (see Patent Document 1), a method of fitting a lid after dropping into a case formed in accordance with the outer shape of the display panel, and the like are employed.

  The former method of attaching and fixing with adhesive material not only causes the thickness of the adhesive material itself to cause dimensional errors, but also increases the number of parts and makes it difficult to store the liquid crystal display panel. Increase that amount. In addition, when disassembling a defective product, it is difficult to remove the adhesive material without a trace, which not only increases the number of repair work, but also impedes separation and disposal.

On the other hand, in the case of using the latter dropping method, the disadvantages of using the above-mentioned adhesive material are eliminated, but it is necessary to allow for the manufacturing dimension tolerance of both the display panel and the storage case. Derived backlash is inevitable. In addition, in order to suppress the occurrence of rattling, it is necessary to reduce the expected tolerance as much as possible. In that case, it is difficult not to drop the display panel into the case and the workability is reduced. When using a glass substrate, the corner | angular part of a glass substrate may hit | omit in a case.
JP-A-10-232625

  It is an object of the present invention to store a display panel excellent in workability and reliability, which can be easily and securely stored without damage to a predetermined position of the case, and can be easily disassembled. It is to provide a holding structure.

  In order to solve the above problems, the display panel storage and holding structure of the present invention has a display panel placed in a predetermined position in a storage case including a panel case formed of an elastic material and a shield case mounted on the panel case. A display panel storage and holding structure for holding and storing, wherein the shield case includes a display window corresponding to a display area of the display panel, and the panel case includes a bottom plate portion on which the display panel is placed. And at least one part of the peripheral wall is formed on the elastic flexible piece, and the shield case is in contact with the elastic flexible piece to bend it. When the shield case is fitted to the panel case in which the display panel is accommodated, the pressing portion is brought into contact with the elastic flexible piece to accommodate the pressing case. The display panel is bent inward until it comes into contact with the end face of the display panel, and the display panel is sandwiched between the elastic flexible piece and the opposed peripheral wall, so that the display area of the shield case is displayed on the display panel. It is characterized by being held in a regular storage position corresponding to the window.

  According to the storage and holding structure of the display panel of the present invention, a part of the peripheral wall of the shield case made of an elastic material is formed on the elastic flexible piece to elastically hold the display panel. It becomes unnecessary, and only by a simple work operation of covering and pushing down the shield case over the panel case, the pressing part on the shield case side is pressed against the elastic flexible piece to elastically deform it, and the manufacturing dimensional tolerance of each member is increased. The expected clearance can be absorbed and pressed against the corresponding end face of the display panel. This allows the display panel to be held in a normal position without rattling, making it extremely easy to store and disassemble. Become. As a result, it is possible to obtain a display panel storage and holding structure that is excellent in workability and reliability and contributes to cost reduction of the display module including the case.

  In the storage and holding structure of the display panel of the present invention, it is preferable that the panel case is formed of resin and the shield case is formed of sheet metal, whereby the elastic flexible piece is formed by resin molding and the pressing portion is processed by sheet metal processing, respectively. It can be easily formed into a desired shape. In this case, it is preferable to process the pressing portion of the shield case into a leaf spring shape, so that the display panel can be stably held at a regular position for a long time.

Hereinafter, preferred embodiments of the present invention will be described.
FIG. 1 is a partially broken plan view showing a liquid crystal display module as an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line II-II.

  The present liquid crystal display module includes a liquid crystal display panel Lp, an illumination panel Ip as an illumination device for the liquid crystal display panel Lp, a panel case 10 that accommodates these panels, and a shield case 20 that is fitted to the panel case 10.

  The liquid crystal display panel Lp has a liquid crystal layer (not shown) sandwiched between a pair of glass substrates 1 and 2, and each glass substrate 1, a display area Av defined by a black mask (not shown), Pixels formed at opposing portions of electrodes (not shown) formed on the two opposing surfaces (inner surfaces) are arranged in a predetermined arrangement. Each of the glass substrates 1 and 2 has a rectangular shape, and one glass substrate 2 has one end thereof extended by an appropriate length from the corresponding end surface of the other glass substrate 1. A driver chip 3 for driving a liquid crystal by outputting a signal voltage is installed. A polarizing plate 4 as an analyzer and a polarizing plate 5 as a polarizer are attached to the outer surfaces of the pair of glass substrates 1 and 2, respectively.

  The illumination panel Ip is a side light type surface emitting illumination device, and a light guide (not shown) disposed opposite to the light guide plate 6 and an end surface thereof, and a main surface of the light guide plate 6 opposed to the liquid crystal display panel Lp, that is, light emission. And the light reflecting plate 8 and the like, which are attached to the surface and the opposite main surface, respectively.

  A panel case 10 that accommodates the liquid crystal display panel Lp and the lighting panel Ip is composed of a rectangular bottom plate 11 and a peripheral wall 12 erected along the periphery thereof. The panel case 10 is molded in a lump using a resin material such as vinyl chloride. Yes. The peripheral wall 12 is formed in a two-stage wall structure including an outer peripheral wall 12a and an inner peripheral wall 12b having a height lower than that of the outer peripheral wall 12a formed along the inner side. Of the space surrounded by the peripheral wall 12 of the two-step wall structure, the illumination panel Ip is accommodated in the lower space S1 surrounded by the inner peripheral wall 12b, and the liquid crystal display panel is displayed in the upper space S2 surrounded by the protruding portion of the outer peripheral wall 12a. Lp is accommodated.

  The size, that is, the vertical, horizontal, and height dimensions of the illumination panel housing space S1 are determined by the distance between the inner surfaces in the longitudinal and respective directions of the inner peripheral wall 12b and the height from the bottom surface of the housing space S1. In the present embodiment, since the illumination panel Ip is accommodated by a drop-in method, each dimension thereof is set to be approximately equal to or slightly larger than the outer dimension of the illumination panel Ip. In addition, the height from the bottom surface of the inner peripheral wall 12b that determines the height of the accommodation space S1 is the thickness of the illumination panel Ip of the polarizing plate 5 attached to the outer surface of the rear glass substrate 2 of the liquid crystal display panel Lp. The dimension is set to the thickness.

  On the other hand, the vertical, horizontal and height dimensions of the display panel housing space S2 are determined by the distances D1, D2 between the inner surfaces in the vertical and horizontal directions of the outer peripheral wall 12a and the protruding height H (from the inner peripheral wall 12b of the outer peripheral wall 12a). 2). The distances D1 and D2 between the inner surfaces D1 and D2 in the vertical and horizontal directions of the outer peripheral wall 12a are set slightly larger than the maximum dimensions that allow for manufacturing tolerances of the vertical and horizontal outer dimensions L1 and L2 of the liquid crystal display panel Lp, respectively. . Further, the protruding height H of the outer peripheral wall 12a from the inner peripheral wall 12b is set to a dimension substantially equal to the thickness excluding the polarizing plates 4 and 5 of the liquid crystal display panel Lp.

  And as shown in FIG. 1, the flat ground part 12c from which the wall was removed over a suitable length is formed in a total of eight places, two places per side of the peripheral wall 12 surrounding the rectangular liquid crystal display panel Lp and the illumination panel Ip. In addition, sandwiching pieces 12d, which are elastic flexible pieces, are erected on these flat portions 12c. The flat ground portion 12c and the sandwiching piece 12d are disposed to face the flat ground portion 12c and the sandwiching piece 12d on the opposite sides. Therefore, in the present embodiment, a total of four pairs of two pairs each in the vertical and horizontal directions of the panel case 10 are provided, that is, the pair of the flat ground portion 12c and the sandwiching piece 12d.

  Here, each flat ground portion 12c is provided in a range extending to the entire width of the outer peripheral wall 12a and approximately half of the width of the inner peripheral wall 12b in the width direction of the peripheral wall 12. Accordingly, the illumination panel housing space S1 is entirely surrounded by the inner peripheral wall 12b. This prevents entry of dust or the like from the outside into the illumination panel housing space S1.

  Further, the standing position of each sandwiching piece 12d is such that the distances d1, d2 between the pair of sandwiching pieces 12d, 12d facing each other in the longitudinal direction and the lateral direction of the liquid crystal display panel Lp are the corresponding longitudinal lengths of the liquid crystal display panel Lp. It is set to be approximately the same as the maximum manufacturing dimension including tolerances of L1 and lateral length L2. The outer surface of the front end portion of each sandwiching piece 12d is formed as an inclined surface 12d1 that is inclined inwardly toward the front end. In addition, although the height of each clamping piece 12d in this embodiment is set to be the same as the height of the outer peripheral wall 12a, it may be set appropriately lower than the outer peripheral wall 12a.

  The panel case 10 of the present embodiment has an extremely complicated shape as described above. Even the panel case 10 having such a complicated shape can be easily formed by using, for example, an injection molding method using a resin material rich in elasticity. Can be formed.

  The shield case 20 fitted to the panel case 10 is formed by processing a sheet metal to form a box shape without a bottom plate, that is, a rectangular top plate 21 from which four corners are removed and surrounding the rectangular top plate 21 and standing on the edge thereof. It is formed on a lid made of the side plate 22 provided. A display window 21a is formed in the top plate 21 so as to correspond to the display area Av of the liquid crystal display panel Lp. In this case, the display window 21a is formed in a rectangular shape that is slightly larger than the display area Av.

  The depth of the side plate 21 in the shield case 20 is slightly shallower than the total height Ht from the outer surface of the bottom plate 11 of the panel case 10 to the front end surface of the peripheral wall 12, and the distance between the inner surfaces in the vertical and horizontal directions is as follows. It is set to be slightly larger than the vertical and horizontal outer dimensions of the bottom plate 11 of the case 10.

  The eight pressing pieces 23 are formed on the periphery of the top plate 21 so as to correspond to the eight sandwiching pieces 12 d of the panel case 10. Each pressing piece 23 is formed by cutting a portion corresponding to each holding piece 12d of the panel case 10 of the side plate 22 and bending it into a "<" shape. In this case, as shown by a two-dot chain line in FIG. 2, when the shield case 20 is fitted to the panel case 10, the apex portion of the "<" character is in contact with the inclined surface 12d1 of the sandwiching piece 12d. The cut portion of the side plate 22 is bent.

  Next, the storage and holding state of the liquid crystal display panel in the liquid crystal display module configured as described above is shown in the case where the outer shape of the liquid crystal display panel Lp shown in FIG. The case where the outer shape of the liquid crystal display panel Lp shown in b) is manufactured to the maximum size will be described separately.

  When the outer shape of the liquid crystal display panel Lp is manufactured to the minimum size, as shown in FIG. 3A, the sandwiching piece 12d is pressed by the pressing piece 23 and bent to the maximum inside the panel case 10, and tilted. The inner side surface of the tip portion is in contact with the corresponding end surface of the glass substrate 1. In this case, when the sandwiching piece 12d is pushed down by covering the panel case 10 with the shield case 20, the apex portion of the "<" shape of the pressing piece 23 comes into contact with the inclined surface 12d1, and the inclined surface 12d1 is smoothly lowered. Due to the slope effect, the tip is pressed and bent toward the inside of the case, and tilts until it contacts the end surface of the glass substrate 1. After the tip of the sandwiching piece 12d comes into contact with the corresponding end surface of the glass substrate 1, the pressing piece 23 descends while sliding on the inclined outer surface of the sandwiching piece 12d until the shield case 20 is completely fitted. While being pushed out towards the outside of the case. FIG. 3A shows the fitting completion state.

  In the above-described fitting completion state, each pressing piece 23 functions as a leaf spring, and the liquid crystal display panel Lp is pressed toward the opposing holding piece 12d of the peripheral wall 12 on the opposite side via the corresponding holding piece 12d. It is fast. Therefore, the liquid crystal display panel Lp is pressed and urged equally from both sides in the vertical and horizontal directions by the four pairs of pressing pieces, respectively, and the center of the display area Av is the shield case 20. It is held at a regular storage position that coincides with the center of the display window 21a.

  When the outer shape of the liquid crystal display panel Lp is manufactured to the maximum size, as described above, the interval between the opposing sandwiching pieces 12d is substantially matched with the maximum manufacturing dimension in the corresponding direction of the outer shape of the liquid crystal display panel Lp. As shown in FIG. 3B, the sandwiching piece 12d is in contact with the end face of the accommodated liquid crystal display panel Lp in a state of being substantially vertical. Accordingly, the pressing piece 23 on the shield case 20 side is maximally spread toward the outside of the case. FIG. 3B shows this fitting completion state.

  Even in the above-described fitting completion state, as in the case where the liquid crystal display panel Lp is manufactured to the minimum size, each pressing piece 23 functions as a leaf spring, and the liquid crystal display panel Lp is connected via the corresponding holding piece 12d. The liquid crystal display panel Lp is pressed and urged equally from both sides in the vertical and horizontal directions by the four pairs of pressing pieces, respectively. The center of the area Av is held at a regular storage position that coincides with the center of the display window 21 a of the shield case 20.

  As described above, according to the present embodiment, the liquid crystal display panel Lp is always equal to the both end faces in the vertical and horizontal directions via the corresponding sandwiching pieces 12d by the corresponding pressing pieces 23 regardless of the manufacturing outer dimensions. The display area Av is held in a normal storage position where the center of the display area Av coincides with the center of the display window 21a of the shield case 20. In this case, the state in which the liquid crystal display panel Lp is held in the proper storage position can be obtained by a simple operation of covering the shield case 20 over the panel case 10 and pushing it down along the outer wall of the peripheral wall 12. Storage work is greatly simplified. Further, since the pressing piece 23 of the shield case serves as a leaf spring, and the liquid crystal display panel Lp is always pressed and urged uniformly in the vertical and horizontal directions, the above-mentioned proper storage and holding state of the liquid crystal display panel Lp is stable for a long time. Maintained. Further, as shown in FIG. 3B, the bending state of the pressing piece 23 is such that the tip protrudes outside the outer surface of the side plate 22 of the shield case 20 even when the pressing piece 23 is maximally expanded. Therefore, the operator is not injured by the tip of the pressing piece 23 when used as a product, and the merchantability as a liquid crystal display module is improved.

  Next, a modification of the above embodiment will be described with reference to FIG. In addition, the same code | symbol is attached | subjected about the component same as the said embodiment, and the description is abbreviate | omitted.

  In the above embodiment, the positioning reference of the holding position of the liquid crystal display panel Lp is the center of the outer shape. However, in this modification, the end surfaces of two adjacent sides of the liquid crystal display panel Lp are the corresponding inner surfaces of the panel case peripheral wall 31. The holding position is positioned in contact with.

  That is, two sandwiching pieces 32 are erected on the peripheral wall 31 of the panel case 30 corresponding to the two adjacent end faces of the liquid crystal display panel Lp to be accommodated, and the pressing piece 43 is formed on the shield case 40 correspondingly. Has been. However, neither the clamping piece nor the pressing piece is provided on the adjacent two end faces opposite to the two end faces. The position of the display window 41a provided on the top plate 41 of the shield case 40 is also set with reference to the inner surface of the side plate 42 corresponding to the two end surfaces on the opposite side.

  In the liquid crystal display panel holding structure of the present modification thus configured, the liquid crystal display panel Lp is pressed toward the panel case peripheral wall 31 on the opposite side by a pressing piece 43 provided on one end side in the vertical and horizontal directions. It is urged | biased and it hold | maintains in the state which contact | abutted those opposite side end surfaces to the corresponding surrounding wall 31 inner surface. In the holding state of the liquid crystal display panel Lp, the center of the display area Av coincides with the center of the shield case display window 41a, and this position is a regular storage position of the liquid crystal display panel Lp.

  As described above, even in the case of the liquid crystal display panel storage and holding structure according to the present modification, the liquid crystal display panel can always be easily placed in the normal storage position regardless of the manufacturing outer dimensions, as in the case of the above-described embodiment. It can be easily and stably held by the work. In this case, it is necessary to finish the end surface of the liquid crystal display panel Lp serving as a positioning reference and the inner surface of the panel case peripheral wall 32 with which the liquid crystal display panel Lp comes into contact with each other with an accurate dimension. Regardless of the molding condition such as the bent form of 43, it is possible to more stably hold the regular storage position.

In addition, this invention is not limited to embodiment mentioned above, a modification, etc.
For example, the outer shape of the display panel and the panel case or shield case for housing the display panel is other various shapes other than the shape shown in the above embodiment, for example, a triangle, a pentagon or more polygon, a circle, an ellipse, etc. Even in this case, the present invention can be preferably applied.

  The display panel is not limited to a liquid crystal display panel, and the present invention can be suitably applied to other flat display panels such as an organic electroluminescence panel and a flat display panel.

It is a partially broken top view which shows the liquid crystal display module as one Embodiment of this invention. It is sectional drawing which cut | disconnects and shows the liquid crystal display module of FIG. 1 by the II-II line. It is a partial expanded sectional view which shows the accommodation state according to the external dimension of the liquid crystal display panel in the said embodiment, (a) is a case where the external shape of a liquid crystal display panel is the minimum, (b) is the maximum of the external shape of a liquid crystal display panel. Each case is shown. It is a top view which shows the modification of the liquid crystal display module of the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Glass substrate 10, 30 Panel case 11 Bottom plate 12 Peripheral wall 12a Outer peripheral wall 12b Inner peripheral wall 12c Flat ground part 12d Clamping piece 20, 40 Shield case 22, 42 Side plate 21a, 41a Display window 23, 43 Press piece Av Display area Lp Liquid crystal Display panel

Claims (3)

A display panel storage and holding structure for holding and storing the display panel in a predetermined position in a storage case comprising a panel case formed of an elastic material and a shield case mounted on the panel case,
The shield case includes a display window corresponding to a display area of the display panel;
The panel case includes a bottom plate portion on which the display panel is placed, and a peripheral wall erected on the periphery of the bottom plate portion,
At least a part of the peripheral wall is formed on an elastic flexible piece, and the shield case is provided with a pressing portion for abutting and bending the elastic flexible piece,
When the shield case is fitted to the panel case in which the display panel is accommodated, the pressing portion is brought into contact with the elastic flexible piece until it is brought into contact with an end surface of the display panel in which the pressure portion is accommodated. The display panel is held in a proper storage position corresponding to the display window of the shield case by holding the display panel between the elastic flexible piece and the peripheral wall on the opposite side. A display panel storage and holding structure.   The display panel storage and holding structure according to claim 1, wherein the panel case is made of resin and the shield case is made of sheet metal.   3. The display panel storage and holding structure according to claim 2, wherein the pressing portion of the shield case is a plate spring formed by processing a sheet metal of the case main body.

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